/Engine/Source/Editor/Blutility/Public/EditorUtilitySubsystem.h
[UEditorUtilityWidget](API\Editor\Blutility\UEditorUtilityWidget) * SpawnAndRegisterTab ( class [UEditorUtilityWidgetBlueprint](API\Editor\Blutility\UEditorUtilityWidgetBlueprint) * InBlueprint )